Tungsten Carbide Insert with Middle Sleeve | Mirror Polish Hex Nut Forming Die

Precision tungsten carbide hex nut forming die insert assembled with a high-strength intermediate middle sleeve, engineered for multi-station cold heading and nut forging machines.

Design Advantages & Structure:

• Pre-Stressed Middle Sleeve Assembly: The intermediate steel sleeve applies calculated compressive pre-stress to the tungsten carbide core, countering high radial expansion pressure during hex nut forging and preventing premature cracking.
• Modular & Cost-Effective: Enables economical replacement of the worn carbide insert while reusing the outer die case, reducing overall tooling expenses.
• Mirror-Polished Hex Cavity: Precision wire-EDM cut and mirror-polished carbide cavity ensure razor-sharp hex corners, strict nut tolerances, and smooth part ejection.

Key Specifications & Features:

• Premium micro-grain tungsten carbide core offering exceptional hardness, wear resistance, and compressive strength.
• Precision-ground sleeve diameter for tight concentricity and repeatable press-fit mounting into cold heading die cases.
• 100% optical inspection and dimensional verification before dispatch.
• Customizable for standard and heavy hex nut specifications (DIN, ISO, ANSI/ASME, JIS) across all multi-station cold formers.

Custom Engineering: Hengfa manufactures custom cold forging dies, carbide inserts, and tooling sleeves tailored to customer drawings. Contact us with your specifications for a quotation.